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通过在镀液中加入介质小球,进行搅拌,对镁合金化学镀Ni-P过程施加机械研磨作用。结果表明,机械研磨改变了镀层的生长方式,获得的镀层表面光滑、平整,镀层颗粒明显细化,没有孔隙;在机械研磨作用下,镀层发生了由非晶向晶态的转变,形成固溶P的晶态Ni镀层,镀层硬度显著提高。机械研磨化学镀Ni-P镀层在400℃热处理1h,镀层中析出Ni3P相,镀层硬度进一步提高,而且镀层中没有传统化学镀Ni-P镀层热处理后产生的裂纹。镁合金机械研磨化学镀Ni-P镀层的耐磨和耐蚀性能获得显著提高。
By adding a medium ball in the bath, stirring, mechanical plating on the magnesium alloy electroless Ni-P process. The results show that mechanical grinding changes the growth mode of the coating, the surface of the coating obtained is smooth and flat, the coating particles are obviously refined and no pores are formed. Under mechanical grinding, the coating undergoes the transformation from amorphous to crystalline, P crystalline Ni plating, coating hardness increased significantly. Mechanical abrasion electroless Ni-P coating is annealed at 400 ℃ for 1h, Ni3P phase is precipitated in the coating, the hardness of the coating is further increased, and there is no crack in the coating after the heat treatment of the conventional electroless Ni-P coating. Magnesium alloy mechanical polishing electroless Ni-P coating wear resistance and corrosion resistance can be significantly improved.